Public Sub New()
　InitializeComponent()
　AddHandler c1DataGrid1.MouseRightButtonDown, AddressOf c1DataGrid1_MouseRightButtonDown
End Sub
Private Sub c1DataGrid1_MouseRightButtonDown(sender As Object, e As MouseButtonEventArgs)

　Dim w As Window = Window.GetWindow(Me)
　Dim point As Point = e.GetPosition(w)
　Dim cell As C1.WPF.DataGrid.DataGridCell = c1DataGrid1.GetCellFromPoint(point)

　If cell IsNot Nothing Then
　　Console.WriteLine(String.Format("Cell Click [{0}, {1}]", cell.Row.Index, cell.Column.Index))
　　c1DataGrid1.CurrentCell = cell
　　c1DataGrid1.Selection.Clear()
　　c1DataGrid1.Selection.Add(cell)
　End If
End Sub

public KB80987()
{
　InitializeComponent();
　c1DataGrid1.MouseRightButtonDown += c1DataGrid1_MouseRightButtonDown;
}

void c1DataGrid1_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
　Window w = Window.GetWindow(this);
　Point point = e.GetPosition(w);
　C1.WPF.DataGrid.DataGridCell cell = c1DataGrid1.GetCellFromPoint(point);

　if (cell != null) {
　　Console.WriteLine(String.Format("Cell Click [{0}, {1}]", cell.Row.Index, cell.Column.Index));
　　c1DataGrid1.CurrentCell = cell;
　　c1DataGrid1.Selection.Clear();
　　c1DataGrid1.Selection.Add(cell);
　}
}